Carburetor



Sept. 27, 12932:. H. scHNEEBELI 1,875,533

CARBURETOR Filed Nov. 18, 1929 2 Sheets-Sheet 1 /A/veNz-d Sept. 27, 1932.

H, SCHNEEBELl CARBURETOR Filed Nov. 18, 1'929 2 Sheets-Sheet 2 Patented Sept. 27, 1932 UNITED. STATES HUGO SCHNEEBELI, 01:" COURBEVOIE, FRANCEA oennnnn'ron Application filed November 18, 1929, Serial No. 408,133, and in France November 21, 19281 The present invention relates to a carburetor for internal combustion engines which is adapted to be connected directly upon the exhauster or upon the petrol tank without any constant level chamber and comprising essentially (A) a chamber arranged in such a Way as to be capable of being put into communication simultaneously with the petrol inlet andA with the atmosphere, with a View to obtain'- ing a very rich mixture by pulverizing the petrol and the primary air'admitted 'into `the chamber.

(B) Aa double valve formed by a needle it@ controlling the delivery ofpetrol into the atomizing chamber mounted in an adjustable manner in a sleeve which is rigid with the said needle and when the carburetor is at rest closes the admission of petrol into the atom- 2@ izing chamber.

(C) a sleeve adapted to control the admis- .sion of primary air into the atomizing chamber, this sleeve, the displacements of which are controlled by the driver, being rigid with the double valve above described, and carrying the latter along with it in its movements. (D) a device connected between the atomizing chamber and the engine for mixing intimately the emulsion formed in the said 3u atomizing chamber with the air which supports combustion in adjustable quantities and delivering the homogeneous explosive gasecus mixture thus formed into the suction pipe of the engine. The deviceV comprises a tubular body mounted upon such pipe and having a nozzle for the admission of the air which supports combustion `mounted in the tubular body, and arranged in such a way as to form with the latter an annular chamber in constant communication with lthe atomizing chamber through a suitable duct and with the suction pipe of the engine through a plurality of oriiices through which the emulsion which is laminated during its l introduction into the annular chamber iinally issues in a finely divided andatomized stateA and mixes upon-leaving these orifices with air for supporting combustion led into the nozzle which comprises a movable valve con-v trolling the admission of this air which sup `6 within which it is screwed but ports combustion and connected by a suitable transmission to the lever operated by the driver and controlling the members controlling the admission of petrol and primary air into the atomizing chamber, so as to secure a simultaneous control of these members and of the valve controlling the admission of the air that supports combustion.

In order to make the invention clear, two forms Aoit construction only of carburetors constructed according to the invention will be described hereinafter with reference to the accompanying drawings. 1

Fig. l shows a first form of construction in elevation.

Figs. 2 and 3 are horizontal and vertical sections respectively taken along the lines AA and BB in Fig. l.

Fig. 4 is a plan view.

F ig.` 5 is a side elevation. l

Fig. 6 is a front elevation of a second form of'construction. y I The carburetor according to the invention is constructed in such a way as to be adapted to be connected directly by means of a union 75 l without employing a constant level chamber with the petrol tank.

l In this union l which is screwed into a socket 2 lodged ina sleeve 3 carried by the lbody of the carburetor is secured by screw- 80 ing the petrol inlet nozzle 4 the central channel of'which is closed by a needle 5.

The rodof this needle 5 is guided in a sleeve y can be moved by means of a knob 7 and set in any desired 85 position of adjustment by a lock nut 8.

The needle is on this account rigid with the sleeve 6 which is supported and maintained in the axis of the body 3 vby screwing in a socket 9 forming a nut and engaging in the 90 end of the body 3 opposite the union l. The free end of the sleeve 6 is in the position of rest of the carburetor pressed against a coni'- cal seating 10 formed at the end of the petrol 95 inlet nozzle 4 and closes the latter as shown in Figure 2. .Y V

The twosockets 2 and 9 which lit in the body 3, as explained above, are shaped as shown in Figure 2 so as to formbetween them 100 'body of the carburetor a certain free space 11 which forms the atomizing chamber.

This atomizing chamber communicates through ducts 12 pierced in the socket 2 with another chamber 13 comprised between the said socket and the nozzle 4 and adapted to receive the petrol delivered by the latter. The two chambersll kand 13 thus formed may moreover be placed in communication with 1 the atmosphere when the nozzle 4 is opened, that is to say when the petrolis admitted.k

with a view to securing simultaneously the entry of primary air into the said chambers and ofobtaining a rich mixturerby the atomization of the petrol.'

These chambers 11 'and 13 are placed in communication with the atmosphere for admitting the primary air by means of ducts 14 pierced in the fixed socket 9 and an annular channel 15 formed by the space comprised between the closing sleeve 6 and the central bore in the fixed socket 2.

The ducts 14 in the socket 9 are closed in the inoperative position of the carburetor by a sleeve 16 whichis mounted with easy friction upon the fixed socket 9V and is split in such a way as to form a collar which surrounds the sleeve 6 and is made rigid with the latter by screwing down the said screw 17. This collar 16 carries an arm 18 connected by means of a rod 19 to oneof the arms of a lever 20 which is keyed upon a shaft 21 journalled in a support 22 which is cast with the and can be controlled by the driver by a suitable member coupled to the arms 23 of the lever 20.

lIt will be understood from the foregoing that the angular displacement imparted to socket 9 the angular the lever 20 is transmitted by the rod 19 to the lever 18 and consequently to the sleeve 16 and the closing sleeve 6 rigid with the latter.

As this sleeve 6 comprises at a certain point on its length a screw thread 6aengaging with a corresponding internal thread in the fixed displacement effected by the said sleeve has the effect of determining its longitudinal displacement and also that of the sleeve 6, the needle 5 and the sleeve 16 and according to the direction of this simul taneous longitudinal displacement of these members, it either opens or closes the nozzle 4 and the ducts 14 and consequently operates and controls the admission of petrol and primary air into the chambers 13and 11.

The rich mixture formed in this chamber 11 by the atomization of the petrol delivered through the vnozzle 4 and intimately mixed with the primary air entering the said chamber, as explained above, is before its admission into the suction duct of the engine intimately mixed with an adjustable quantity of air for supporting combustion, with a view to producing a perfectly homogeneous explosive gaseous mixture.

Forthis purpose a tubular body 24, mounted upon the suction pipe of the engine, is connected by a suitable duct 25 to the atomizing chamber 11.

In the tubular body 24, apertures for admitting air for supporting the combustion are formed at 26 and this body serves for housing a nozzle or mouth 27 leading at one end above the apertures 26 and at the other end into the admission pipe of the engine.

This nozzle 27 is so shaped that a certain space is formed between it and the tubular body 24 in which it is lodged. This space formsa chamber 28 which communicates at its basse through an annular passage of extremely small section 29 with an annular groove 30 formed in the body 24 and in constant communication with the atomizing chamber 11 through the duct 25.

Orifices 32 are moreover pierced in the wall of the nozzle 27 at the top of the chamber 28 and put the latter into communication with the suction pipe of the engine.

By means of this arrangement the emulsion led into the annular groove 30 is lamina-ted during its passage through the annular duct 29 at the moment it enters the chamber 28 and is then finely divide-d and atomized upon leaving the latter by the orifices 32.

In the interior of the nozzle 27 which forms a channel for the admission of air for sup porting the combustion is mounted a valve 33 which is suitably guided in the body of the carburetor' and can be displaced longitudinally in the nozzle in order to regulate the section of the latter at will and control the admission of air for supporting combustion, which is drawn in through the apertures 26 formed in the tubular body 24 and mixes intimately in the said nozzle 27 with the emulsion delivered in the finely divided and atomized state by the oriiices 32.

y In the form of construction shown in Figures 1 to 5, the stem 34 of the valve 33 is connected by rods 35 to the arm 36 of the lever which is keyed upon the shaft 21 and is ac tuated by the driver as described above, and controls simultaneously the double valve 5-'6, the sleeve 16 and the valve 33, that is to say the admission and the delivery ofthe petrol and the admission of the primary air and the air for supporting the combustion.

The operating shaft 21 may similarly be displaced angularly by means of two driving teeth, one tooth 37 rigid with the shaft 21 and the other 38 rigid with a driving crank 39 loose upon the end of the said shaft and controlled byliand. By loosely mounting the lever upon the shaft the arm may hang in an inoperative position.

The carburetor shown in Figure 6 is ther same as that described with reference to gures 1 to 5, and only differs from the latter by dispensing with the shaft 21 and the control lever keyed upon the latter. In this form of construction this operating lever comprises tivo arms which, as shown clearly Vin Figure 6, are rigid With the sleeve 16 controlling the admission of primary air. One of these arms 18 is connected by a rod 35 to the stem 3410i* the valve 33 controlling the admission of air for supporting combustion and the other arm 18 is connected by the head 181 to the operating member.

In the two forms of construction described above, it has been assum-ed that the tubular body 24 encloses the nozzle 27 With the central valve 33. The duct 25, which is formed in the body 3, connects the interior of the body 24 with atomizing chamber 11. llwhe petrol inlet nozzle 4, the double valve 5-6 and the sleeve 16 controlling the admission of primary air are also mounted inV the body.

This general arrangement is nevertheless only given by Way of example and it will be understood that Without changing the invention in .any Way these tvvo essential parts of the carburetor may be separa-te from each other. ln this case the part of Vthe carburetor containing the atomizing chamber 11 and the members specified above for admitting and controlling the petrol and also for admitting and controlling the primary air is directly connected by the union 1 with the petrolY tank. The device for admitting and controlling the air for supporting combustion-and for forming an intimate mixture of the latter with the emulsion formed in the atomizing chamber includes a tubular'body 24. in Which the internal nozzle 27 and the valve 33 are confined.

Naturally the valve 33 controlling the admission of air for supporting the combustion is connected by a lever or a suitable set of levers to the control lever in lsuch a Way as to obtain, as explained above, the ysimultaneous control of the said valve 33 and the members admitting and controlling' the petrol and primary air in the atomizing chamber 11. y

The arrangements described above-are naturally only given by Way of example, and the shapes, materials and dimensions of the constituent parts and also the constructional details may be modified Without on that account going outside the scope of the invention.

l cla-im:

l. A carburetor for internal combustion engines having an atomizing chamber therein, a fuel feed nozzle in communication with the atomizing chamber, means for introducing primary air into the atomizing chamber, said nozzle having a seat thereon, a sleeve constituting a valve for engaging the seat When the carburetor is inits inoperative posif ture for controlling the flow of the mixture orifice to regulate the supply of fuel therefrom into the atomizing chamber.

2. A carburetor for internal combustion engines comprising a body having an atomizing chamber therein, a fuel supply nozzle fitted in the body and having a fuel inlet orifice therein, a seat on the inner end of the nozzle, said body having a fuel receiving chamber surrounding the nozzle and communicating with the atomizing chamber, means for introducing primary air into the fuel receiving chamber and controlling the supply thereto, a sleeve disposed axially Within the body and constituting a valve to close the fuel inlet orifice When the carburetor is in its inoperative position, a needle valve extending through the sleeve and adjustable to regulatethe flow of fuel from the orifice into the fuel receiving chamber, and a valve strucfrom the atomizing chamber to the engine.

3. A carburetor for internal combustion engines comprising a body having a socket member therein, a nozzle fitted to the socket member and having a fuel orifice therein and a seat surrounding one end thereof, a sleeve valve adjustable axially in the body adapted to engage the seat When the carburetor is in its inoperative position, a needle valve in the sleeve and movable therewith, said needle valve cooperating With the fuel orifice to regulate the flovv of fuel therefrom, said body having a fuel receiving chamber surrounding the nozzle, and an atomizing chamber surrounding the socket member, means for conducting fuel from the fuel chamber into the atomizing chamber, means for controlling the admission of primary air to the fuel chamber, and a valve structure controlling the flow of fuel mixture from the atomizing chamber to the engine.

The foregoing specification of my carburetor signed by me this fifth day of November 1929.

HUGO SCHNEEBELI.

tion, a needle valve extending through `theV sleeve, said nozzle having a fuel orifice therein, said needle valve cooperating with the iso 

